Grandmaster Repertoire 1A. The Catalan. Boris Avrukh. Quality Chess

Transcription

1 Grandmaster Repertoire 1A The Catalan By Boris Avrukh Quality Chess

2 Preface More than six years have passed since Quality Chess published my original contribution to its opening series, appropriately titled Grandmaster Repertoire 1 1.d4 Volume One, which was followed by its companion Grandmaster Repertoire 2 1.d4 Volume Two early in (These works will henceforth be abbreviated to GM 1 and GM 2 respectively.) To my great surprise and satisfaction, these volumes were extremely successful. The recommended lines were employed by players at all levels, and demand grew to such an extent that the volumes were translated into several languages. Chess players took to referring to these texts as The Opening Bible and the term to Avrukh became part of the chess lexicon, meaning to have easily obtained an opening advantage after employing one of my novelties or recommendations. Six years is a lifetime in the evolution of opening theory, especially in a battleground such as the Catalan, where ideas are constantly being tested and refined by the world s top players and their pet computers. I do not claim to have refuted Black s various defensive tries, but I have strived to offer fresh, challenging ideas that an opponent will find difficult to face over the board. That is the approach I take when working with my students, including some of the world s top players. Series Structure GM 1 and especially GM 2 were hefty books, numbering well over a thousand pages between them. Many of my original recommendations have since been tested and scrutinized by top grandmasters and correspondence players, making this new repertoire not so much an updated edition as a complete reworking, using the original repertoire as a loose template. In view of the many new games and discoveries that have occurred since the previous 1.d4 works, it was necessary to divide each book into an A and a B volume, with some slight reorganizing in terms of the grouping together of certain systems. The opening moves 1.d4 f6 2.c4 e6 3.g3 provide the starting position for the current volume 1A. By far the biggest section of the book is devoted to the Catalan after 3...d5 4. f3, which is one of the signature openings that defined GM 1. Against certain set-ups I was able to keep approximately the same recommendations for White, although in such cases I almost always found ways to tweak things to squeeze the best possible value from White s position. In some lines, however, I opted to go in a completely different direction from before. See, for instance, the main line in Chapter 16, where 8. xc4 has been replaced by 8.a4, which I have employed with considerable success in recent years. Although this volume is titled The Catalan, it also covers the Bogo-Indian, as well as any Benoni variants that may arise after 3...c5 in the aforementioned tabiya. In the Modern Benoni, important new resources have been uncovered against the sharp set-up I recommended in GM 2. That is why, in Chapters 24 and 25, you will find the more positional 10. f4 as our weapon of choice. I know that many devoted chess players of all levels have been looking forward to this new Grandmaster Repertoire on 1.d4. I hope that the new series, beginning with the present volume 1A, will provide the reader with many stimulating ideas, and, of course, excellent practical results. Boris Avrukh Chicago, March 2015

3 Contents Preface 3 Key to symbols used & Bibliography 6 Catalan 1 Introduction 7 Catalan 4...dxc d c b bd Introduction to 5...c c5, 6... c6 and 7... d a6 and 6...b b a6 and 6... c c6 146 Catalan 4... b4 12 Various 5th Moves Introduction to 5... e e7 Main Line 196 Catalan 4... e7 15 Closed System dxc4 252

4 Bogo-Indian e7 and 4...c xd a e7 5. f3 Various 5th Moves e7 5. f3 c6 336 Odd Benonis 22 Catalan Benoni Snake Benoni 376 Modern Benoni 24 Introduction e8 399 Variation Index 426

5 22 Chapter Odd Benonis Catalan Benoni Variation Index o 1.d4 f6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 b5 6.e4 xe4 7. g2!? d6 8. f3 A) 8... e7 366 B) 8... e f4 368 B1) e8 369 B2) c4!? 369 B3) a6 11. e1 b7 12. c3 371 B31) e8 371 B32) c7 372 B33) 12...b4 374 A) note to 12...f6 14. c3!n B2) after a3!? 16. e4!n B32) note to 14...a6 17. c6!n

6 Chapter 22 Catalan Benoni d4 f6 2.c4 e6 3.g3 c5 This is an important possibility, which I have encountered quite often in my own praxis. I can easily understand Black s thinking, as the Benoni offers him more counterattacking possibilities than many of his defensive setups against the Catalan. White s fianchetto system is not considered the most dangerous choice against the Benoni, and Black has a few different ways to handle the position, so there is decent potential to surprise an opponent. Catalan players have tried to solve this problem in different ways. Some react to Black s last move with 4. f3, leading to a version of the English Opening. Others favour the 3. f3 move order, intending to meet 3...d5 with 4.g3, but this obviously allows the major option of 3...b6 with a Queen s Indian. Personally, I have always enjoyed playing against all Benoni variants, and have achieved a fantastic score with White. In the next four chapters I will share my knowledge and hopefully guide the reader towards similar success. 4.d5 exd5 5.cxd5 5...b5 This move will be the exclusive subject of the current chapter. I call it the Catalan Benoni because it almost always arises via the 3.g3 move order which is favoured by Catalan players. Unlike some other variations covered in this book, this one requires detailed opening knowledge from White s side you don t have to memorize every last detail, but nor can you rely solely on general principles. I remember a time when Black s last move was considered highly problematic for White, which was understandable, as Black normally has to work hard to carry out the...b5 advance in the Modern Benoni. However, the fact that Black has not yet castled gives White chances to seize the initiative with a pawn sacrifice. 6.e4 I mentioned this as an interesting possibility in GM 2, but subsequent games and analysis have led me to recommend it as the main line. In GM 2 I recommended 6. f3, which brought White an excellent victory in Gelfand Aronian, Mexico City This has also been tested in many games, and the popular 6... b7 7.e4 xe4 resembles our main line, and may even transpose. However, the text move is more forcing and reduces Black s options xe4 This is obviously the critical continuation, but it is important to mention Black s alternatives e7 Black is trying to deflect White s lightsquared bishop from attacking the b5-pawn. However, I found a remarkable game where White found a convincing antidote. 7.f3!? Maintaining the attack on b5. Black would get a comfortable position after 7. g2 d6 followed by...g6,... g7 and so on.

7 364 Odd Benonis 7...a6 8. h3! Impressive play, avoiding the stereotypical development to g2 in favour of a more active diagonal b7 8...g6 9. e2 g7 10.a4 pretty much forces 10...b4, with similar play to the game. Instead b7?! runs into 11.axb5 axb5 12. xa8 xa8 13. a3! with a clear advantage. 9. e2 d6 10.a4 b4 Forced. 11. d2 bd7 12. c4 e5 13. xe5 xe5 14.a5! d8 15. a4 was threatened e7 16. f4 d7 17. d3 d4 18. g f4 h6 20. e1 fe8 21.b3 White had a pleasant advantage in Bergmann Kolar, b7 This prevents the e4-e5 threat, but ignores the b5-pawn. 7. xb5 xe4 8. e2 8. c3 also looks promising: 8... e7 9. ge2 xc3 10.bxc3 e xd5 12. xd5 xd5 13. f4 f3 14. e1 d8 15. c4 c6 This was Terreaux Nyvlt, corr. 2012, and here I would recommend 16. e3n g4 17. xf7 d6 18. d3², followed by a3, with a pleasant edge for White d6 Black might try to improve, but White has easy development and should be better regardless a3! a6?? This move blunders a piece, but even after the superior e8 11. d3 f8 12. c3 d6 13. f4 Black is under a lot of pressure. 11. d3 b4 12. xe4+ Duzhakov E. Levin, Peterhof g2!? This surprisingly rare move seems extremely promising to me, and the arising positions are much easier to understand than after the messy 7. e2 e7 8. g2. I spent many hours analysing the latter variation for Vladimir Kramnik back in 2007, helping him to score a nice win over Alekseev at the Tal Memorial that same year.

8 Chapter 22 Catalan Benoni d6 This is the standard reaction. White s main idea is that the knight will block the d7-pawn for several moves, meaning that Black will experience serious difficulties developing his queenside pieces. Obviously 7... f6?? is impossible due to 8.d6, hitting the rook while threatening to win material with e e7? 8. e2!n In both of the existing games White failed to exploit Black s error, and merely played 8. e2?, transposing to 7. e2 as mentioned above. I find it much more logical to go for castling, since Black s last move has left him a long way from completing development on the kingside, and the open e-file puts him in serious danger. 8...d f6 10. e1 My engine suggests the surprising positional sacrifice 10.b4!? cxb4 11. e1 d8 12.a3, evaluating the position heavily in White s favour d8 11. g5 e7 12. xf6! gxf6 Unfortunately for Black, xf6 runs into the powerful 13. f4 e7 (neither f8 14. e6 nor e5 14. d3 are much help either) 14. e6! fxe6 15.dxe6 and Black is losing material. 13. f4 Black has a miserable position. A final option is: 7... a5!?n This was mentioned by Petrov in Grandmaster Repertoire 12 The Modern Benoni (henceforth abbreviated to GM 12) as an interesting alternative for Black, but it does not really help him. 8. d2 d6 9. gf3 e e1! Petrov analyses 11.a4 a6 12. b3 d8 13.axb5 xb5 14. e5 when White has a lot of compensation. However, I find the text move even more convincing f6 12.a4 a6 Also after 12...bxa4 13. xa4 d8 14. b3 a6 15. f4± White s activity is too much for Black. 13. e5! The threat of g4 is difficult to meet xe5

9 366 Odd Benonis Other moves are even worse. For instance, b4 14. b3 c7 15. g4, followed by f4, and e8 14. g4 e7 15. b3 b6 16. f4± both clearly favour White. I also considered b8 14. g4 d8 15. xf6 xf6 16. f3 and White s kingside initiative plays itself. 14. xe5 b7 15. b3 b6 16.axb5 xb5 17. a5 ae8 18. c4 d8 19. xe8 xe8 20. a5! d4 21. e3 Despite being a pawn down, White has an overwhelming positional advantage. 8. f3 This is the right moment to share a nice story with my readers. When I played in the Croatian League in 2012, one of my teammates asked for my assistance in preparing the Catalan. We scheduled an appointment a few hours before the game, and he duly arrived at my hotel room armed with his laptop. He was actually happy enough with the Catalan, but he was worried about this version of the Benoni involving 5...b5. The story continues under A) 8... e7, the move that was troubling my team-mate. We will then move on to the main line of B) 8... e7. A) 8... e7 9. e3 f5 I was really surprised when my team-mate told me about his approach to openings. He mentioned that he was relying on the Houdini Opening Book, where everything is perfectly analysed with Houdini, and all that the user has to do is memorize the moves. I started to explain to him that you cannot always trust such a source, and that there is still a need for human reasoning when preparing openings. He proceeded to open the program on his laptop, and we quickly moved to the present position, which Houdini had dismissed as unfavourable for White. I was surprised that nobody had tried this line for Black, and was keen to explore more deeply. The next few moves are obvious xe3 11.fxe3 d xe3?? 12. h1 is just lost for Black. The Houdini analysis ended here with an evaluation of clearly better for Black, but I was not ready to give up. 12.e4! White wants to break through in the centre, exploiting the fact that Black, despite having won a pawn, is way behind in development.

10 Chapter 22 Catalan Benoni 367 A few months after our analysis session, I was lucky enough to be able to test this position for myself against the Israeli GM Ram Soffer in a rapid tournament. He had played 8... e7 with a triumphant look, but you can imagine his surprise when I blitzed out my next four moves. At this point he sank into deep thought and came up with: p f6 I had briefly considered g4, but after 13.e5! d7 14.exd6 xd6 15. c3 Black is in big trouble, due to the coming check along the e-file d7 This seems like Black s best try. It was the main option we investigated, and it was tested in a subsequent correspondence game. 13.e5! dxe5 14. c3!n 14.d6 only led to an unclear endgame after xd6 15. xd6 xd6 16. g5 f6 17. xa8 fxg5 when Black had three pawns for the exchange in Fordham-Hall L. Van Damme, corr b c4? 15. e4 f5 16.d6 e6 17. fg5 wins easily for White, so the text move is the best try. 15. e4ƒ Black is in grave danger. Apart from the obvious d5-d6, White also has attacking resources such as h3 and fg5. 13.e5! This secondary sacrifice improves the scope of all of White s pieces fxe5 14. c3 a6 15.a4! I wanted to provoke...b4 in order to get a powerful outpost on c4 for my second knight g6 My opponent realized that he needed to speed up the development of his kingside, and decided to return one pawn, but it is not enough to save him. 16.axb5 h6 17. d2! f5 18. c4 18. xf5n xd2 19. f1 is also extremely strong.

11 368 Odd Benonis b6! Black soon found himself in a completely lost position in Avrukh Soffer, Givatayim (rapid) Already he has no good moves, since d7 loses to 20.g4!. B) 8... e This leaves Black in less immediate danger than the previous line, but he still faces problems in coordinating his pieces. 10. f4 White s strategy becomes clear. The d5-pawn seriously restricts Black s queenside pieces, and finding a suitable way to develop them is no easy task especially taking into account that moving the knight from d6 (in order to facilitate...d6) will leave him susceptible to d5-d6. In short, I believe White s compensation is more than sufficient. Black s three most important moves are B1) e8, B2) c4!? and B3) a6. It is worth pointing out that the moves... a6,... b7 and... e8 can be played in different orders, meaning there are transpositions galore. To make things easier to follow, I would like to point out that any set-ups where the knight goes to a6 in the next few moves will be covered under variation B a5 11. e1 a6 is hardly a good idea. In Korchmar Taysayev, Taganrog 2014, the simple 12.a4N b4 (or 12...bxa4 13. c3! followed by xa4) 13. bd2 b7 14. b3 would have given White a huge advantage b7 I only found one game where this move was played, but it gives rise to a major transposition. 11. e1 This position has occurred in more than 60 games, most of them featuring Gelfand s 6. f3 idea. However, in the great majority of cases, Black has developed his knight to a6 in the next few moves, transposing to a later variation e a6 takes us to variation B c3 b4 Again a6 transposes, this time to variation B31. The text move is an independent try, but White has a good answer. 13. xd6 xd6 14. xe8 xe8 15. b5 f8 16. d3! This excellent move secures White s advantage. Aside from the obvious idea of e1, Black also has to watch out for g5, which explains his next move g6 17. d2 a6 18. e1 Unfortunately for Black, the simplifications have not solved his main problem: the undeveloped queenside.